it would be more informative, though admittedly more cumbersome. That
is, the information not given at the very start of the presentation, is
that Gilmore wasn't suddenly put off the flight. Rather, he was
repeatedly required, first by a steward, then by the captain, not to
wear the button, with the captain saying it would "endanger the
aircraft". And he responded "I told him that it was a political
statement and declined to remove it." It would capture even more of
the flavor of the event to have a title of

"Making political statement about being a "Suspected Terrorist"
gets Gilmore ejected from airplane.

I sympathize with Gilmore's reaction. But under these circumstances,
I think the captain was correct.
Now, when Jonathan Swift published "A Modest Proposal", there were people
who thought he was serious about eating babies.

Gilmore means his button as a hip, ironic, joking statement. But there
will be uncool, unhip, un-smart people, who
just won't get the joke. Some people's minds simply
don't work with appreciation of the kind of humor popular
in the techie crowd. They can't imagine someone voluntarily wearing
such a designation about potentially being a terrorist.
They will think
"OH MY GOD THERE'S A SUSPECTED TERRORIST ON THIS PLANE!"

Gilmore's stunt is in fact one of the closest things I've ever
seen in real life to the hoary free-speech cliche regarding
"falsely shouting fire in a theater and causing a panic."

He wants to "joke about being a terrorist while on an
airplane, regardless of causing a panic"

It's not quite the same thing. But it's still notable for
its physical aspect of provoking a response of fear and danger. Again,
such actions are overall
being a troll, not being a freedom-fighter.